Workflow for making an animated short
I haven't come across any NLA tutorials that teach more than mixing actions together. When it comes to making the final movie, using the VSE is more common. In the Sintel videos you will find a couple that should interest you, the first is about animatic editing, the other laying out a shot - both are available free from the blender cloud.

As you have done a storyboard, start by adding those images to the VSE, play it back and adjust the length of each shot until the timing feels right. Then as you progress through completing each shot you replace the storyboard images with the updated animations. This is the process you will see in the animatic editing video.

I think that once you get past a simple animation made from one camera, you will find that models get saved into their own files and then linked into shot files that render each part of the final video, then all these pieces get mixed together for the final video.